From Just Solve the File Format Problem
BFS (also BeFS) is the file format for BeOS. See also Haiku which is a recreation of BeOS and can read BFS to a greater or lesser extent.
- The BeOS file system: an OS geek retrospective accessed 28 Oct 2012.
- Practical File System Design With the Be File System, by Dominic Giampaolo (the designer of BFS)